Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
/*
 * Copyright (c) 2018, 2019 O.S.Systems
 *
 * SPDX-License-Identifier: Apache-2.0
 */

#include <logging/log.h>

LOG_MODULE_REGISTER(updatehub);

#include <zephyr.h>

#include <logging/log_ctrl.h>
#include <net/socket.h>
#include <net/net_mgmt.h>
#include <net/net_ip.h>
#include <net/udp.h>
#include <net/coap.h>
#include <net/dns_resolve.h>
#include <drivers/flash.h>
#include <power/reboot.h>
#include <tinycrypt/sha256.h>
#include <data/json.h>

#include "include/updatehub.h"
#include "updatehub_priv.h"
#include "updatehub_firmware.h"
#include "updatehub_device.h"

#if defined(CONFIG_UPDATEHUB_DTLS)
#define CA_CERTIFICATE_TAG 1
#include <net/tls_credentials.h>
#endif

#define NETWORK_TIMEOUT K_SECONDS(2)
#define UPDATEHUB_POLL_INTERVAL K_MINUTES(CONFIG_UPDATEHUB_POLL_INTERVAL)
#define MAX_PATH_SIZE 255
#define MAX_PAYLOAD_SIZE 500
#define MAX_DOWNLOAD_DATA 1100
#define COAP_MAX_RETRY 3
#define MAX_IP_SIZE 30

#if defined(CONFIG_UPDATEHUB_CE)
#define UPDATEHUB_SERVER CONFIG_UPDATEHUB_SERVER
#else
#define UPDATEHUB_SERVER "coap.updatehub.io"
#endif

static struct updatehub_context {
	struct coap_block_context block;
	struct k_sem semaphore;
	struct flash_img_context flash_ctx;
	struct tc_sha256_state_struct sha256sum;
	enum updatehub_response code_status;
	u8_t uri_path[MAX_PATH_SIZE];
	u8_t payload[MAX_PAYLOAD_SIZE];
	int downloaded_size;
	struct pollfd fds[1];
	int sock;
	int nfds;
} ctx;

static struct update_info {
	char package_uid[TC_SHA256_BLOCK_SIZE + 1];
	char sha256sum_image[TC_SHA256_BLOCK_SIZE + 1];
	int image_size;
} update_info;

static void wait_fds(void)
{
	if (poll(ctx.fds, ctx.nfds, NETWORK_TIMEOUT) < 0) {
		LOG_ERR("Error in poll");
	}
}

static void prepare_fds(void)
{
	ctx.fds[ctx.nfds].fd = ctx.sock;
	ctx.fds[ctx.nfds].events = 1;
	ctx.nfds++;
}

static int metadata_hash_get(char *metadata)
{
	struct tc_sha256_state_struct sha256sum;
	unsigned char hash[TC_SHA256_DIGEST_SIZE];
	char buffer[3];
	int buffer_len = 0;

	if (tc_sha256_init(&sha256sum) == 0) {
		return -1;
	}

	if (tc_sha256_update(&sha256sum, metadata, strlen(metadata)) == 0) {
		return -1;
	}

	if (tc_sha256_final(hash, &sha256sum) == 0) {
		return -1;
	}

	memset(update_info.package_uid, 0, TC_SHA256_BLOCK_SIZE + 1);
	for (int i = 0; i < TC_SHA256_DIGEST_SIZE; i++) {
		snprintk(buffer, sizeof(buffer), "%02x",
			 hash[i]);
		buffer_len = buffer_len + strlen(buffer);
		strncat(&update_info.package_uid[i], buffer,
			MIN(TC_SHA256_BLOCK_SIZE, buffer_len));
	}

	return 0;
}

static bool
is_compatible_hardware(struct resp_probe_some_boards *metadata_some_boards)
{
	int i;

	for (i = 0; i < metadata_some_boards->supported_hardware_len; i++) {
		if (strncmp(metadata_some_boards->supported_hardware[i],
			    CONFIG_BOARD, strlen(CONFIG_BOARD)) == 0) {
			return true;
		}
	}
	return false;
}

static bool start_coap_client(void)
{
	struct addrinfo *addr;
	struct addrinfo hints;
	int resolve_attempts = 10;
	int ret = -1;

	if (IS_ENABLED(CONFIG_NET_IPV6)) {
		hints.ai_family = AF_INET6;
		hints.ai_socktype = SOCK_STREAM;
	} else if (IS_ENABLED(CONFIG_NET_IPV4)) {
		hints.ai_family = AF_INET;
		hints.ai_socktype = SOCK_STREAM;
	}

#if defined(CONFIG_UPDATEHUB_DTLS)
	int verify = TLS_PEER_VERIFY_NONE;
	sec_tag_t sec_list[] = { CA_CERTIFICATE_TAG };
	int protocol = IPPROTO_DTLS_1_2;
	char port[] = "5684";
#else
	int protocol = IPPROTO_UDP;
	char port[] = "5683";
#endif

	while (resolve_attempts--) {
		ret = getaddrinfo(UPDATEHUB_SERVER, port, &hints, &addr);
		if (ret == 0) {
			break;
		}
		k_sleep(K_SECONDS(1));
	}
	if (ret < 0) {
		LOG_ERR("Could not resolve dns");
		return false;
	}

	ctx.sock = socket(addr->ai_family, SOCK_DGRAM, protocol);
	if (ctx.sock < 0) {
		LOG_ERR("Failed to create UDP socket");
		return false;
	}

#if defined(CONFIG_UPDATEHUB_DTLS)
	if (setsockopt(ctx.sock, SOL_TLS, TLS_SEC_TAG_LIST,
		       sec_list, sizeof(sec_list)) < 0) {
		LOG_ERR("Failed to set TLS_TAG option");
		return false;
	}

	if (setsockopt(ctx.sock, SOL_TLS, TLS_PEER_VERIFY, &verify, sizeof(int)) < 0) {
		LOG_ERR("Failed to set TLS_PEER_VERIFY option");
		return false;
	}
#endif

	if (connect(ctx.sock, addr->ai_addr, addr->ai_addrlen) < 0) {
		LOG_ERR("Cannot connect to UDP remote");
		return false;
	}

	prepare_fds();

	return true;
}

static void cleanup_connection(void)
{
	if (close(ctx.sock) < 0) {
		LOG_ERR("Could not close the socket");
	}

	memset(&ctx.fds[1], 0, sizeof(ctx.fds[1]));
	ctx.nfds = 0;
	ctx.sock = 0;
}

static int send_request(enum coap_msgtype msgtype, enum coap_method method,
			enum updatehub_uri_path type)
{
	struct coap_packet request_packet;
	int ret = -1;
	u8_t content_application_json = 50;
	u8_t *data = k_malloc(MAX_PAYLOAD_SIZE);

	if (data == NULL) {
		LOG_ERR("Could not alloc data memory");
		goto error;
	}

	ret = coap_packet_init(&request_packet, data, MAX_PAYLOAD_SIZE, 1,
			       COAP_TYPE_CON, 8, coap_next_token(), method,
			       coap_next_id());
	if (ret < 0) {
		LOG_ERR("Could not init packet");
		goto error;
	}

	switch (method) {
	case COAP_METHOD_GET:
		snprintk(ctx.uri_path, MAX_PATH_SIZE,
			 "%s/%s/packages/%s/objects/%s", uri_path(type),
			 CONFIG_UPDATEHUB_PRODUCT_UID, update_info.package_uid,
			 update_info.sha256sum_image);

		ret = coap_packet_append_option(&request_packet,
						COAP_OPTION_URI_PATH,
						ctx.uri_path,
						strlen(ctx.uri_path));
		if (ret < 0) {
			LOG_ERR("Unable add option to request path");
			goto error;
		}

		ret = coap_append_block2_option(&request_packet,
						&ctx.block);
		if (ret < 0) {
			LOG_ERR("Unable coap append block 2");
			goto error;
		}

		ret = coap_packet_append_option(&request_packet, 2048,
						UPDATEHUB_API_HEADER, strlen(UPDATEHUB_API_HEADER));
		if (ret < 0) {
			LOG_ERR("Unable add option to add updatehub header");
			goto error;
		}

		break;

	case COAP_METHOD_POST:
		ret = coap_packet_append_option(&request_packet,
						COAP_OPTION_URI_PATH,
						uri_path(type),
						strlen(uri_path(type)));
		if (ret < 0) {
			LOG_ERR("Unable add option to request path");
			goto error;
		}

		ret = coap_packet_append_option(&request_packet,
						COAP_OPTION_CONTENT_FORMAT,
						&content_application_json,
						sizeof(content_application_json));
		if (ret < 0) {
			LOG_ERR("Unable add option to request format");
			goto error;
		}

		ret = coap_packet_append_option(&request_packet, 2048,
						UPDATEHUB_API_HEADER, strlen(UPDATEHUB_API_HEADER));
		if (ret < 0) {
			LOG_ERR("Unable add option to add updatehub header");
			goto error;
		}

		ret = coap_packet_append_payload_marker(&request_packet);
		if (ret < 0) {
			LOG_ERR("Unable to append payload marker");
			goto error;
		}

		ret = coap_packet_append_payload(&request_packet,
						 &ctx.payload,
						 strlen(ctx.payload));
		if (ret < 0) {
			LOG_ERR("Not able to append payload");
			goto error;
		}

		break;

	default:
		LOG_ERR("Invalid method");
		ret = -1;
		goto error;
	}

	ret = send(ctx.sock, request_packet.data, request_packet.offset, 0);
	if (ret < 0) {
		LOG_ERR("Could not send request");
		goto error;
	}

error:
	k_free(data);

	return ret;
}

static void install_update_cb(void)
{
	struct coap_packet response_packet;
	char buffer[3], sha256_image_dowloaded[TC_SHA256_BLOCK_SIZE + 1];
	u8_t *data = k_malloc(MAX_DOWNLOAD_DATA);
	int i, buffer_len = 0;
	int rcvd = -1;

	if (data == NULL) {
		LOG_ERR("Could not alloc data memory");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto cleanup;
	}

	wait_fds();

	rcvd = recv(ctx.sock, data, MAX_DOWNLOAD_DATA, MSG_DONTWAIT);
	if (rcvd <= 0) {
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		LOG_ERR("Could not receive data");
		goto cleanup;
	}

	if (coap_packet_parse(&response_packet, data, rcvd, NULL, 0) < 0) {
		LOG_ERR("Invalid data received");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto cleanup;
	}

	ctx.downloaded_size = ctx.downloaded_size +
			      (response_packet.max_len - response_packet.offset);

	if (tc_sha256_update(&ctx.sha256sum,
			     response_packet.data + response_packet.offset,
			     response_packet.max_len - response_packet.offset) < 1) {
		LOG_ERR("Could not update sha256sum");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto cleanup;
	}

	if (flash_img_buffered_write(&ctx.flash_ctx,
				     response_packet.data + response_packet.offset,
				     response_packet.max_len - response_packet.offset,
				     ctx.downloaded_size == ctx.block.total_size) < 0) {
		LOG_ERR("Error to write on the flash");
		ctx.code_status = UPDATEHUB_INSTALL_ERROR;
		goto cleanup;
	}

	if (coap_update_from_block(&response_packet, &ctx.block) < 0) {
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto cleanup;
	}

	if (coap_next_block(&response_packet, &ctx.block) == 0) {
		LOG_ERR("Could not get the next");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto cleanup;
	}

	if (ctx.downloaded_size == ctx.block.total_size) {
		u8_t image_hash[TC_SHA256_DIGEST_SIZE];

		if (tc_sha256_final(image_hash, &ctx.sha256sum) < 1) {
			LOG_ERR("Could not finish sha256sum");
			ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
			goto cleanup;
		}

		memset(&sha256_image_dowloaded, 0, TC_SHA256_BLOCK_SIZE + 1);
		for (i = 0; i < TC_SHA256_DIGEST_SIZE; i++) {
			snprintk(buffer, sizeof(buffer), "%02x", image_hash[i]);
			buffer_len = buffer_len + strlen(buffer);
			strncat(&sha256_image_dowloaded[i], buffer,
				MIN(TC_SHA256_BLOCK_SIZE, buffer_len));
		}

		if (strncmp(sha256_image_dowloaded,
			    update_info.sha256sum_image,
			    strlen(update_info.sha256sum_image)) != 0) {
			LOG_ERR("SHA256SUM of image are not the same");
			ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
			goto cleanup;
		}
	}

	ctx.code_status = UPDATEHUB_OK;

cleanup:
	k_free(data);
}

static enum updatehub_response install_update(void)
{
	int verification_download = 0;
	int attempts_download = 0;

	if (boot_erase_img_bank(DT_FLASH_AREA_IMAGE_1_ID) != 0) {
		LOG_ERR("Failed to init flash and erase second slot");
		ctx.code_status = UPDATEHUB_FLASH_INIT_ERROR;
		goto error;
	}

	if (tc_sha256_init(&ctx.sha256sum) < 1) {
		LOG_ERR("Could not start sha256sum");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		goto error;
	}

	if (!start_coap_client()) {
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		goto error;
	}

	if (coap_block_transfer_init(&ctx.block, COAP_BLOCK_1024,
				     update_info.image_size) < 0) {
		LOG_ERR("Unable init block transfer");
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		goto cleanup;
	}

	flash_img_init(&ctx.flash_ctx);

	ctx.downloaded_size = 0;

	while (ctx.downloaded_size != ctx.block.total_size) {
		verification_download = ctx.downloaded_size;

		if (send_request(COAP_TYPE_CON, COAP_METHOD_GET,
				 UPDATEHUB_DOWNLOAD) < 0) {
			ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
			goto cleanup;
		}

		install_update_cb();

		if (ctx.code_status != UPDATEHUB_OK) {
			goto cleanup;
		}

		if (verification_download == ctx.downloaded_size) {
			if (attempts_download == COAP_MAX_RETRY) {
				LOG_ERR("Could not get the packet");
				ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
				goto cleanup;
			}
			attempts_download++;
		}
	}

cleanup:
	cleanup_connection();

error:
	ctx.downloaded_size = 0;

	return ctx.code_status;
}

static int report(enum updatehub_state state)
{
	struct report report;
	int ret = -1;
	const char *exec = state_name(state);
	char *device_id = k_malloc(DEVICE_ID_MAX_SIZE);
	char *firmware_version = k_malloc(BOOT_IMG_VER_STRLEN_MAX);

	if (device_id == NULL || firmware_version == NULL) {
		LOG_ERR("Could not alloc device_id or firmware_version memory");
		goto error;
	}

	if (!updatehub_get_device_identity(device_id, DEVICE_ID_MAX_SIZE)) {
		goto error;
	}

	if (!updatehub_get_firmware_version(firmware_version, BOOT_IMG_VER_STRLEN_MAX)) {
		goto error;
	}

	memset(&report, 0, sizeof(report));
	report.product_uid = CONFIG_UPDATEHUB_PRODUCT_UID;
	report.device_identity.id = device_id;
	report.version = firmware_version;
	report.hardware = CONFIG_BOARD;
	report.status = exec;
	report.package_uid = update_info.package_uid;

	switch (ctx.code_status) {
	case UPDATEHUB_INSTALL_ERROR:
		report.previous_state =
			state_name(UPDATEHUB_STATE_INSTALLING);
		break;
	case UPDATEHUB_DOWNLOAD_ERROR:
		report.previous_state =
			state_name(UPDATEHUB_STATE_DOWNLOADING);
		break;
	case UPDATEHUB_FLASH_INIT_ERROR:
		report.previous_state =
			state_name(UPDATEHUB_FLASH_INIT_ERROR);
		break;
	default:
		report.previous_state = "";
		break;
	}

	if (strncmp(report.previous_state, "", sizeof("") - 1) != 0) {
		report.error_message = updatehub_response(ctx.code_status);
	} else {
		report.error_message = "";
	}

	memset(&ctx.payload, 0, MAX_PAYLOAD_SIZE);
	ret = json_obj_encode_buf(send_report_descr,
				  ARRAY_SIZE(send_report_descr),
				  &report, ctx.payload,
				  MAX_PAYLOAD_SIZE - 1);
	if (ret < 0) {
		LOG_ERR("Could not encode metadata");
		goto error;
	}

	if (!start_coap_client()) {
		goto error;
	}

	ret = send_request(COAP_TYPE_NON_CON, COAP_METHOD_POST,
			   UPDATEHUB_REPORT);
	if (ret < 0) {
		goto cleanup;
	}

	wait_fds();

cleanup:
	cleanup_connection();

error:
	k_free(firmware_version);
	k_free(device_id);

	return ret;
}

static void probe_cb(char *metadata)
{
	struct coap_packet reply;
	char tmp[MAX_PAYLOAD_SIZE];
	int rcvd = -1;

	wait_fds();

	rcvd = recv(ctx.sock, metadata, MAX_PAYLOAD_SIZE, MSG_DONTWAIT);
	if (rcvd <= 0) {
		LOG_ERR("Could not receive data");
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		return;
	}

	if (coap_packet_parse(&reply, metadata, rcvd, NULL, 0) < 0) {
		LOG_ERR("Invalid data received");
		ctx.code_status = UPDATEHUB_DOWNLOAD_ERROR;
		return;
	}

	if (COAP_RESPONSE_CODE_NOT_FOUND == coap_header_get_code(&reply)) {
		LOG_INF("No update available");
		ctx.code_status = UPDATEHUB_NO_UPDATE;
		return;
	}

	memset(&tmp, 0, MAX_PAYLOAD_SIZE);
	memcpy(tmp, reply.data + reply.offset, reply.max_len - reply.offset);
	memset(metadata, 0, MAX_PAYLOAD_SIZE);
	memcpy(metadata, tmp, strlen(tmp));

	ctx.code_status = UPDATEHUB_OK;

	LOG_INF("Probe metadata received");
}

enum updatehub_response updatehub_probe(void)
{
	struct probe request;
	struct resp_probe_some_boards metadata_some_boards;
	struct resp_probe_any_boards metadata_any_boards;

	char *metadata = k_malloc(MAX_PAYLOAD_SIZE);
	char *metadata_copy = k_malloc(MAX_PAYLOAD_SIZE);
	char *device_id = k_malloc(DEVICE_ID_MAX_SIZE);
	char *firmware_version = k_malloc(BOOT_IMG_VER_STRLEN_MAX);

	if (device_id == NULL || firmware_version == NULL ||
	    metadata == NULL || metadata_copy == NULL) {
		LOG_ERR("Could not alloc probe memory");
		ctx.code_status = UPDATEHUB_METADATA_ERROR;
		goto error;
	}

	k_sem_init(&ctx.semaphore, 0, 1);

	if (!boot_is_img_confirmed()) {
		LOG_ERR("The current image is not confirmed");
		ctx.code_status = UPDATEHUB_UNCONFIRMED_IMAGE;
		goto error;
	}

	if (!updatehub_get_firmware_version(firmware_version, BOOT_IMG_VER_STRLEN_MAX)) {
		ctx.code_status = UPDATEHUB_METADATA_ERROR;
		goto error;
	}

	if (!updatehub_get_device_identity(device_id, DEVICE_ID_MAX_SIZE)) {
		ctx.code_status = UPDATEHUB_METADATA_ERROR;
		goto error;
	}

	memset(&request, 0, sizeof(request));
	request.product_uid = CONFIG_UPDATEHUB_PRODUCT_UID;
	request.device_identity.id = device_id;
	request.version = firmware_version;
	request.hardware = CONFIG_BOARD;

	memset(&ctx.payload, 0, MAX_PAYLOAD_SIZE);
	if (json_obj_encode_buf(send_probe_descr,
				ARRAY_SIZE(send_probe_descr),
				&request, ctx.payload,
				MAX_PAYLOAD_SIZE - 1) < 0) {
		LOG_ERR("Could not encode metadata");
		ctx.code_status = UPDATEHUB_METADATA_ERROR;
		goto error;
	}

	if (!start_coap_client()) {
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		goto error;
	}

	if (send_request(COAP_TYPE_CON, COAP_METHOD_POST, UPDATEHUB_PROBE) < 0) {
		ctx.code_status = UPDATEHUB_NETWORKING_ERROR;
		goto cleanup;
	}

	memset(metadata, 0, MAX_PAYLOAD_SIZE);
	probe_cb(metadata);

	if (ctx.code_status != UPDATEHUB_OK) {
		goto cleanup;
	}

	memset(&update_info, 0, sizeof(update_info));
	if (metadata_hash_get(metadata) < 0) {
		LOG_ERR("Could not get metadata hash");
		ctx.code_status = UPDATEHUB_METADATA_ERROR;
		goto cleanup;
	}

	memcpy(metadata_copy, metadata, strlen(metadata));
	if (json_obj_parse(metadata, strlen(metadata),
			   recv_probe_sh_array_descr,
			   ARRAY_SIZE(recv_probe_sh_array_descr),
			   &metadata_some_boards) < 0) {

		if (json_obj_parse(metadata_copy, strlen(metadata_copy),
				   recv_probe_sh_string_descr,
				   ARRAY_SIZE(recv_probe_sh_string_descr),
				   &metadata_any_boards) < 0) {
			LOG_ERR("Could not parse json");
			ctx.code_status = UPDATEHUB_METADATA_ERROR;
			goto cleanup;
		}

		memcpy(update_info.sha256sum_image,
		       metadata_any_boards.objects[1].objects.sha256sum,
		       strlen(metadata_any_boards.objects[1].objects.sha256sum));
		update_info.image_size = metadata_any_boards.objects[1].objects.size;
	} else {
		if (!is_compatible_hardware(&metadata_some_boards)) {
			LOG_ERR("Incompatible hardware");
			ctx.code_status =
				UPDATEHUB_INCOMPATIBLE_HARDWARE;
			goto cleanup;
		}
		memcpy(update_info.sha256sum_image,
		       metadata_some_boards.objects[1].objects.sha256sum,
		       strlen(metadata_some_boards.objects[1]
			      .objects.sha256sum));
		update_info.image_size =
			metadata_some_boards.objects[1].objects.size;
	}

	ctx.code_status = UPDATEHUB_HAS_UPDATE;

cleanup:
	cleanup_connection();

error:
	k_free(metadata);
	k_free(metadata_copy);
	k_free(firmware_version);
	k_free(device_id);

	return ctx.code_status;
}

enum updatehub_response updatehub_update(void)
{
	if (report(UPDATEHUB_STATE_DOWNLOADING) < 0) {
		LOG_ERR("Could not reporting downloading state");
		goto error;
	}

	if (report(UPDATEHUB_STATE_INSTALLING) < 0) {
		LOG_ERR("Could not reporting installing state");
		goto error;
	}

	if (install_update() != UPDATEHUB_OK) {
		goto error;
	}

	if (report(UPDATEHUB_STATE_DOWNLOADED) < 0) {
		LOG_ERR("Could not reporting downloaded state");
		goto error;
	}

	if (report(UPDATEHUB_STATE_INSTALLED) < 0) {
		LOG_ERR("Could not reporting installed state");
		goto error;
	}

	if (report(UPDATEHUB_STATE_REBOOTING) < 0) {
		LOG_ERR("Could not reporting rebooting state");
		goto error;
	}

	LOG_INF("Image flashed successfully, you can reboot now");

	return ctx.code_status;

error:
	if (ctx.code_status != UPDATEHUB_NETWORKING_ERROR) {
		if (report(UPDATEHUB_STATE_ERROR) < 0) {
			LOG_ERR("Could not reporting error state");
		}
	}

	return ctx.code_status;
}

static void autohandler(struct k_delayed_work *work)
{
	switch (updatehub_probe()) {
	case UPDATEHUB_UNCONFIRMED_IMAGE:
		LOG_ERR("Image is unconfirmed. Rebooting to revert back to previous"
			"confirmed image.");

		sys_reboot(SYS_REBOOT_WARM);
		break;

	case UPDATEHUB_HAS_UPDATE:
		switch (updatehub_update()) {
		case UPDATEHUB_OK:
			sys_reboot(SYS_REBOOT_WARM);
			break;

		default:
			break;
		}

		break;

	case UPDATEHUB_NO_UPDATE:
		break;

	default:
		break;
	}

	k_delayed_work_submit(work, UPDATEHUB_POLL_INTERVAL);
}

void updatehub_autohandler(void)
{
	static struct k_delayed_work work;

	k_delayed_work_init(&work, autohandler);
	k_delayed_work_submit(&work, K_NO_WAIT);
}